Reset the space_needed variable to 256 on sucessful completion of compactify().
xread() and xwrite() return the number of bytes transferred.
Add support for source files with MODCOMP conditionals.
Return the number of bytes for xread() and xwrite().
Changes for Release 1.3 and xpl0011
Add the -p option to pad lines to a fixed length.
Reformat
Add --verbose option to display filename being processed.